摘要
采用SPI串行接口和MC14489管理芯片来构成智能化仪器仪表的显示驱动电路可使系统的性能价格比获得大幅度的提高。根据热敏电阻的物理特性并结合嵌入式单片机的功能特点，介绍了一种基于ARM7LPC2142微控制器为核心，利用其内部自带的A／D转换器和SPI串行接口来控制LED显示驱动器MC14489进行温度实时显示的智能热敏电阻温度计的设计。主要从硬件设计、软件调试两个方面做了详细阐述。并利用设计的电路对＋10～150℃范围内的温度进行了测量，达到了良好效果。
Using the SPI serial interface and the MC14489 management chip constitute the intellectualized instrument measuring appliance,the demonstration actuation electric circuit to be possible to cause the systems performance price compared to obtain the large scale enhancement. This article according to the physical property of the thermal resistor and the function of embeded single chip microcomputer,introduces a kind of micro controller using the A/D switch and the SPI serial interface based on ARM7 LPC2142 for the nuclear indignation, which interior brings control LED demonstration driver MC14489 to carry on the temperature real - time display the intelligent thermistor thermometer design. Mainly from the hardware design,software debug to make the detailed elaboration. And the designed electric circuit has carried on the survey to 10 - 150℃ scopes temperature,has achieved the good effect.
出处
《现代电子技术》
2007年第8期59-61,共3页
Modern Electronics Technique
